Measuring material relaxation and creep recovery in a microfluidic device

Alison E. Koser; Lichao Pan; Nathan C. Keim; Paulo E. Arratia

doi:10.1039/c3lc41379a

Measuring material relaxation and creep recovery in a microfluidic device

Alison E. Koser, Lichao Pan, Nathan C. Keim, Paulo E. Arratia

Research output: Contribution to journal › Article › peer-review

17 Scopus citations

Abstract

We present a novel method of testing creep recovery in a microfluidic device. This method allows for the measurement of relaxation time of fluids at low strain. After applying a steady pressure-driven flow along a microchannel, the pressure is released and the fluid is allowed to relax and come to rest. Local strains are observed via the time-dependent velocity profiles and are fit to a general viscoelastic model to obtain the fluids' relaxation times. The use of polymeric solutions of various molecular weights allows for the observation of time scales for strains ranging from 0.01 to 10. Results are consistent with data obtained in a macroscopic rheometer and with a viscoelastic constitutive model.

Original language	English (US)
Pages (from-to)	1850-1853
Number of pages	4
Journal	Lab on a Chip
Volume	13
Issue number	10
DOIs	https://doi.org/10.1039/c3lc41379a
State	Published - 2013
Externally published	Yes

ASJC Scopus subject areas

Bioengineering
Biochemistry
General Chemistry
Biomedical Engineering

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abstract = "We present a novel method of testing creep recovery in a microfluidic device. This method allows for the measurement of relaxation time of fluids at low strain. After applying a steady pressure-driven flow along a microchannel, the pressure is released and the fluid is allowed to relax and come to rest. Local strains are observed via the time-dependent velocity profiles and are fit to a general viscoelastic model to obtain the fluids' relaxation times. The use of polymeric solutions of various molecular weights allows for the observation of time scales for strains ranging from 0.01 to 10. Results are consistent with data obtained in a macroscopic rheometer and with a viscoelastic constitutive model.",

author = "Koser, {Alison E.} and Lichao Pan and Keim, {Nathan C.} and Arratia, {Paulo E.}",

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AU - Koser, Alison E.

AU - Pan, Lichao

AU - Keim, Nathan C.

AU - Arratia, Paulo E.

PY - 2013

Y1 - 2013

N2 - We present a novel method of testing creep recovery in a microfluidic device. This method allows for the measurement of relaxation time of fluids at low strain. After applying a steady pressure-driven flow along a microchannel, the pressure is released and the fluid is allowed to relax and come to rest. Local strains are observed via the time-dependent velocity profiles and are fit to a general viscoelastic model to obtain the fluids' relaxation times. The use of polymeric solutions of various molecular weights allows for the observation of time scales for strains ranging from 0.01 to 10. Results are consistent with data obtained in a macroscopic rheometer and with a viscoelastic constitutive model.

AB - We present a novel method of testing creep recovery in a microfluidic device. This method allows for the measurement of relaxation time of fluids at low strain. After applying a steady pressure-driven flow along a microchannel, the pressure is released and the fluid is allowed to relax and come to rest. Local strains are observed via the time-dependent velocity profiles and are fit to a general viscoelastic model to obtain the fluids' relaxation times. The use of polymeric solutions of various molecular weights allows for the observation of time scales for strains ranging from 0.01 to 10. Results are consistent with data obtained in a macroscopic rheometer and with a viscoelastic constitutive model.

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JF - Lab on a Chip

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Measuring material relaxation and creep recovery in a microfluidic device

Abstract

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